Im going to disagree with WEEKEND ADDICTION
just do the butter thing,it is exactly the same except it is much easier to collect all of your solid from a liquid, rather than scraping some goo off a chunk of ice.
Also you do not need to cook it as long as you would fresh buds:
because the vaping has prepared the cannabinoids to be dissolved pretty quickly.
water,butter, buds- simmer
about 40 min and your set, I usually do an hour. strain through cloth(i use a t wet shirt piece) while its still hot(wear rubber gloves) let cool in the fridge ,or freezer if you are in a hurry.
when the butter is solid you just tilt the pan and the liquid pours out leaving the butter in the pan, thats pretty damn easy
this is optional but i feel that it makes the product much cleaner:
after draining the poo water pour some cold clean water in the pan with the butter and pour it out of the pan again,
you will see the milk solids that are stuck to the underside of the butter be washed away,
collect the green gold
now you have clean butter that is ready to be cooked with.